Apparatus for grinding



Feb. 2, 1932. c. l. 14m 1,843,614

v APPARATUS FOR GRINDING 1 Filed May 26, 1928 Patented Feb. 2, 1932 os'rnrss UN IT lit..-

CHARLES I. LQTT, OF NEW YORK, N. Y.

APPARATUS FOR GRINDING Application filed May 26, was. Serial No.280,931.

My invention relates to an apparatus for accurately and economicallygrinding and polishing the bevels on cylindrical rollers for rollerbearings, and particularly to one which 15 overcomes the necessity foraccurately mounting each roller in a lathe, or the like,

whereby a material saving in the cost of manufacture is obtained.

In the accompanying drawings:

Fig. 1 is a diagrammatic end View of what is commonly called acenterless grinder.

Fig. 2 is a fragmentary top view of my magazine carrying a plurality ofrollers, a grinding wheel, and a turning wheel of a 1 centerlessgrinder, the arrows indicating the directions of motion.

. Fig. 3 is an enlarged detail, partly in section of my magazine showingrollers supported therein- Fig. 4 is a side view of Fig. 3.

In these figures, 11 is a grinding wheel, 12 a turning wheel spaced fromsaid grinding wheel with its axis slightly converging toward the axisof'said grinding wheel.

A fixed work guide 13, has an upwardly open slot 14, through which amagazine 15 may slide. This magazine is rovided with a plurality ofdiagonal paral el cylindrical apertures 16, an inwardlyv taperedshoulder 17, along a portion of one margin, and is upwardly open at 18.

The angle made by these apertures with a plane perpendicular to thelongitudinal axis of the magazine depends upon the angle desired for thebevel on the finished product, which for rollers of the type shown maybe from 5 degrees to 45 degrees.

A cylindrical roller 19 is revolubly supported in each aperture 16, witha portion of each end extending beyond the sides of my magazine.

Preferably the axes of the rollers 19 are inclined to the horizontal,thereby bringing the points of contact of the rollers 19 with theperipheral faces of the wheels 11, and 12 on opposite sides of a planepassing through the axes of said'rollers.

In the preferred form illustrated, these rollers 19 are initiallyroughly beveled be- 50 fore being tempered, thus materially reducing theamount of grinding required in the finishing process. By suitablyadjusting the magazine 15 to permit the rollers 19 to move toward theshoulder 17 as the corner is cut away, and preferably modifying theshape of the grinding wheel face, blank rollers having sharp corners maybe used instead of those illustrated.

The method of operation is to load my magazine with unfinished rollers,the shoulders 17 preventing these rollers from passing entirely throughthe aperture 16, place the loaded magazine in the slot 14 and advance itbetween the grinding wheel and the turning wheel with the shouldersadjacent to the grinding wheel, as shown in Fig. 2 contact with theturning wheel being made first so that the rollers are rotating beforethe grinding wheel is reached. The slight convergence of the axes of thegrinding and turning wheels serves to keep these rollers in contact withthe grinding wheels as the magazine passes through the machine, andinsuring accurate work.

' When one end has been thus ground and polished, the magazine with therollers contained therein is passed through a second similar machinewhich finishes the opposite ends of these rollers. By reversing therollers in my magazine a single machine may be used, the secondoperation being a repetition of the first.

The open slots 18 aid the washing off of the waste material removed bythe grinding operation. 1

A further modification of my method is to substitute for the turningwheel shown, a second grinding wheel, which will permit the grinding andpolishing of the bevels on both ends in a single passage of my magazine.This would, however, require constant checking up and readjustment tokeep these grmding surfaces properly spaced in order that the rollersshould not vary more than allowed by the specifications.

By suitably modifying my apparatus, 1t may be used for finishing beveledcorners on other articles than rollers for roller bearings, for exampletubular articles may be finished by my method.

signature,

I may make other modifications of my invention within the terms of theclaims as they may be allowed, and I therefore claim claims may fairlybe construed. i

What I claim is I my methodand apparatusas broadly as such 1. In adevice of the class described, a work a holding magazine adapted toindividually. and revolubly support a plurality. of cylindrical articleswith their axes parallel to each other and oblique to the axis'of saidmagazine with portions of the ends of said articles" protruding fromsaid magazine. 7

2. A magazine of the class described pro-- vided with a plurality ofparallel oblique ap ertures, each having an internal stop.

3. The combination with a centerless one end partly closed by grinderhaving a fixedguideway, of a ma 2o azine adapted to be reciprocated insald guideway and to revolubly support a plurality of cylindricalarticles with their axesoblique tosaid guideway and their ends incontact with a'grinding wheel and a turning wheel of said grinder.

4. In a device of the class described, a

work holding magazine comprising a longitudinally movable member havingdiagonal roller seats therein, said seats projecting at one end over acorner of a roller opposite the point of contact of the corner of suchroller with its grinding surface.

hereunto a my Lns 1. ori. V

In testimony whereofll neeaeite

